本题目来源于试卷: Physics Unit32: Elementary Particles，类别为 通用国际物理
[单选题]
The Feynman diagram shows the 5kk;z ty) 2g6lo eqfv1 weak interaction of a n lr;g/g,p;um3 svufj -eutrino ($\nu$) and a neutron ($n$), mediated by a $W+$ particle. The interaction produces an electron ($e-$) and another particle. What is the other particle?
A. a positron ($e+$)
B. a pion ($\pi+$)
C. a proton ($p$)
D. a quark
E. an anti-neutron
参考答案: C
本题详细解析:
暂无
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